QgsMapUnitScale Class Reference

Struct for storing maximum and minimum scales for measurements in map units. More...

#include <qgsmapunitscale.h>

Public Member Functions
	QgsMapUnitScale (double minScale=0.0, double maxScale=0.0)
	Constructor for QgsMapUnitScale. More...
double	computeMapUnitsPerPixel (const QgsRenderContext &c) const
	Computes a map units per pixel scaling factor, respecting the minimum and maximum scales set for the object. More...
bool	operator!= (const QgsMapUnitScale &other) const
bool	operator== (const QgsMapUnitScale &other) const

Public Attributes
double	maxScale
	The maximum scale, or 0.0 if unset. More...
double	minScale
	The minimum scale, or 0.0 if unset. More...

Detailed Description

Struct for storing maximum and minimum scales for measurements in map units.

For measurements in map units, a minimum and a maximum scale can be defined. Outside this range, the measurements aren't scaled anymore proportionally to the map scale.

Definition at line 33 of file qgsmapunitscale.h.

Constructor & Destructor Documentation

QgsMapUnitScale::QgsMapUnitScale ( double  minScale = 0.0, double  maxScale = 0.0  )

inline

Constructor for QgsMapUnitScale.

Parameters

minScale	minimum allowed scale, or 0.0 if no minimum scale set
maxScale	maximum allowed scale, or 0.0 if no maximum scale set

Definition at line 41 of file qgsmapunitscale.h.

Member Function Documentation

double QgsMapUnitScale::computeMapUnitsPerPixel ( const QgsRenderContext &  c ) const

inline

Computes a map units per pixel scaling factor, respecting the minimum and maximum scales set for the object.

Parameters

c	render context

Returns

map units per pixel, limited between minimum and maximum scales

Definition at line 53 of file qgsmapunitscale.h.

bool QgsMapUnitScale::operator!= ( const QgsMapUnitScale &  other ) const

inline

Definition at line 73 of file qgsmapunitscale.h.

bool QgsMapUnitScale::operator== ( const QgsMapUnitScale &  other ) const

inline

Definition at line 68 of file qgsmapunitscale.h.

Member Data Documentation

double QgsMapUnitScale::maxScale

The maximum scale, or 0.0 if unset.

Definition at line 46 of file qgsmapunitscale.h.

double QgsMapUnitScale::minScale

The minimum scale, or 0.0 if unset.

Definition at line 44 of file qgsmapunitscale.h.

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The documentation for this class was generated from the following file:

• /build/qgis-kTw4tW/qgis-2.8.6+dfsg/src/core/qgsmapunitscale.h